
In numerical estimates we will use
\(\bar{g}_{LR}^{\pi \pi } =8.23 \) 
(in the \(\overline{\rm MS}\)  scheme at \(\mu = 2\,\text{GeV}\) ,
based on the lattice QCD results of Ref. [1]})
and assume the range \(\bar{g}_{LR}^{NN} \in [-10,+10]\) .
